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On 28/03/2006, at 9:54 AM, Simon Coulter wrote:
And look closely at the printed dates. Why are the second and third the same date? Why does adding 1 month to 2006-01-31 not give 2006-02-28? Easy to explain once you understand what is happening but I'd rather have RPG's behaviour than Java's.
The last example used the Date class. Here is one using the Calendar class:
midrange.com
import java.util.*;
public class PraveenCalendar
{
public static void main(String[] args)
{
GregorianCalendar gc = new GregorianCalendar(2006, 0, 31); //
Java's inconsistent counting practices
System.out.println(gc.getTime());
gc.add(Calendar.MONTH, 1);
System.out.println(gc.getTime());
gc.add(Calendar.MONTH, 1);
System.out.println(gc.getTime());
gc.add(Calendar.MONTH, 1);
System.out.println(gc.getTime());
gc.add(Calendar.MONTH, 1);
System.out.println(gc.getTime());
}
}
> java PraveenCalendar Tue Jan 31 00:00:00 GMT 2006 Tue Feb 28 00:00:00 GMT 2006 Tue Mar 28 00:00:00 GMT 2006 Fri Apr 28 00:00:00 GMT 2006 Sun May 28 00:00:00 GMT 2006 Hmm ... looks just like the results I'd expect from RPG IV! Regards, Simon Coulter. -------------------------------------------------------------------- FlyByNight Software AS/400 Technical Specialists http://www.flybynight.com.au/ Phone: +61 3 9419 0175 Mobile: +61 0411 091 400 /"\ Fax: +61 3 9419 0175 \ / X ASCII Ribbon campaign against HTML E-Mail / \ --------------------------------------------------------------------
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